Nonlinear ion-acoustic structures in dusty plasma with superthermal electrons and positrons

Journal Article · Sun May 15 04:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3592255· OSTI ID:21537795

El-Tantawy, S A ^[1]; El-Bedwehy, N A ^[2]; Moslem, W M ^[1]

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1. Department of Physics, Faculty of Science, Port Said University, Port Said 42526 (Egypt)
2. Department of Mathematics, Faculty of Science, Mansoura University, Damietta El-Gedida 34517 (Egypt)

Nonlinear ion-acoustic structures are investigated in an unmagnetized, four-component plasma consisting of warm ions, superthermal electrons and positrons, as well as stationary charged dust impurities. The basic set of fluid equations is reduced to modified Korteweg-de Vries equation. The latter admits both solitary waves and double layers solutions. Numerical calculations indicate that these nonlinear structures cannot exist for all physical parameters. Therefore, the existence regions for both solitary and double layers excitations have been defined precisely. Furthermore, the effects of temperature ratios of ions-to-electrons and electrons-to-positrons, positrons and dust concentrations, as well as superthermal parameters on the profiles of the nonlinear structures are investigated. Also, the acceleration and deceleration of plasma species have been highlight. It is emphasized that the present investigation may be helpful in better understanding of nonlinear structures which propagate in astrophysical environments, such as in interstellar medium.

• OSTI ID: 21537795
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 18; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIFFERENTIAL EQUATIONS
DUSTS
EQUATIONS
IMPURITIES
ION ACOUSTIC WAVES
ION WAVES
KORTEWEG-DE VRIES EQUATION
NONLINEAR PROBLEMS
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
PLASMA IMPURITIES
PLASMA WAVES
QUASI PARTICLES
SOLITONS